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Inventory - Schedule of Inventory (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventory [Line Items]
Inventory, Gross	$ 6,684us-gaap_InventoryGross	$ 5,956us-gaap_InventoryGross
Inventory Valuation Reserves	(539)us-gaap_InventoryValuationReserves
Inventory, Net	5,275us-gaap_InventoryNet	5,631us-gaap_InventoryNet
Hand Held Imager Assemblies [Member]
Inventory [Line Items]
Inventory, Gross	350	0
Obsolete Inventory [Member]
Inventory [Line Items]
Inventory Valuation Reserves	(870)	(325)
Accessories [Member]
Inventory [Line Items]
Inventory, Gross	514	554
Components/raw materials [Member]
Inventory [Line Items]
Inventory, Gross	2,552	0
Mela Find Systems [Member]
Inventory [Line Items]
Inventory, Gross	3,268	5,402
Inventory Repairs [Member]
Inventory [Line Items]
Inventory Valuation Reserves	$ (539)	$ 0